Prepare for release, 4.3.0. (opensearch-project#633)

Signed-off-by: dblock <[email protected]>

CHANGELOG.md

@@ -2,7 +2,7 @@
 
 Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 
-## [Unreleased]
+## [4.3.0]
 
 ### Added
 - Adds ISM Alias action ([#615](https://github.com/opensearch-project/opensearch-go/pull/615))
@@ -278,7 +278,7 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 - Bumps `github.com/stretchr/testify` from 1.8.0 to 1.8.1
 - Bumps `github.com/aws/aws-sdk-go` from 1.44.45 to 1.44.132
 
-[Unreleased]: https://github.com/opensearch-project/opensearch-go/compare/v4.2.0...HEAD
+[4.3.0]: https://github.com/opensearch-project/opensearch-go/compare/v4.2.0...v4.3.0
 [4.2.0]: https://github.com/opensearch-project/opensearch-go/compare/v4.1.0...v4.2.0
 [4.1.0]: https://github.com/opensearch-project/opensearch-go/compare/v4.0.0...v4.1.0
 [4.0.0]: https://github.com/opensearch-project/opensearch-go/compare/v3.1.0...v4.0.0

internal/version/version.go

@@ -27,4 +27,4 @@
 package version
 
 // Client returns the client version as a string.
-const Client = "4.2.1"
+const Client = "4.3.0"